Do you know your phone number?

One of the things that drives me absolutely crazy is when people don't know their phone number. Ya....it's true! Some of them are clueless!
In my job with the answering service,I have to ask each caller what their call back number is so the doctor can return their call. There are too many people who say,"Uhm....I don't know my phone number because I don't call myself."

You don't call yourself? That's supposed to be a valid excuse? I don't write to myself but I know my home address!
That's all I have to say!